ARM: add AArch32 support and new vcvt instructions

src/cpu.cc

Index: src/cpu.cc
diff --git a/src/cpu.cc b/src/cpu.cc
index 2eb00c4ac43fe24ac8815c3ec2ee8dcabf22fdf1..802f74046afb1193b3df56c963adce2badf73949 100644
--- a/src/cpu.cc
+++ b/src/cpu.cc
@@ -352,10 +352,14 @@ CPU::CPU() : stepping_(0),
   // same file.
   char* architecture = cpu_info.ExtractField("CPU architecture");
   if (architecture != NULL) {
-    char* end;
-    architecture_ = strtol(architecture, &end, 10);
-    if (end == architecture) {
-      architecture_ = 0;
+    if (strcmp(architecture, "AArch64") == 0) {
+      architecture_ = 8;
+    } else {
+      char* end;
+      architecture_ = strtol(architecture, &end, 10);
+      if (end == architecture) {
+        architecture_ = 0;
+      }
     }
     delete[] architecture;